Clarkwas a freshman all-American two years ago playing right guard and first-team All-Big 12 last year playing left tackle.

Line coach Lee Hays has said he loved the idea of having a player ofClark’s size (6-foot-5, 313 pounds) and skills on the inside to boost the run game. Kingsbury said he’s not sure whetherClarkwould play left guard or right guard.

“Either one,” he said.

Robertson (6-5, 300) is a February signee fromRiverside,California,CityCollege. The fact Robertson has played left tackle exclusively is part of the reason for movingClark. Coaches believe Robertson will have a better chance to help in a hurry if he can stay at that spot.

“I’ve heard good things,” Kingsbury said. “Physically he looks great. He got into the (offseason) workouts and did a good job and was in shape. And then he’s picking up the system. We expect him to slide right in there and be a starter for us.”